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Doubles in this session

Current system

20113+3550
HJ 1489AD

Nearby doubles

2' : 20113+3551
BKO 100

2' : 20114+3552
HJ 1490

6' : 20115+3545
TDT2066

7' : 20119+3551
SEI 983AB

8' : 20108+3552
SEI 954

8' : 20119+3550
SEI 985AB

10' : 20110+3559
SEI 961

11' : 20122+3548
SEI 992

11' : 20105+3550
SEI 944

11' : 20115+3539
SEI 968

12' : 20118+3540
SEI 979

12' : 20117+3600
SEI 978

14' : 20124+3549
TOB 177

14' : 20124+3545
BKO 104AB

14' : 20122+3600
SEI 991

15' : 20115+3604
SEI 972

15' : 20125+3552
SEI1001

16' : 20121+3603
SEI 990

17' : 20123+3540
FYM 582

17' : 20122+3603
SEI 994

18' : 20114+3532
TDT2064

20' : 20101+3602
SEI 938

23' : 20107+3529
RAO 427

23' : 20109+3612
SEI 959

23' : 20097+3600
SEI 936

23' : 20113+3527
SEI 966

Selections

Binocular doubles

Quadruple Systems

Multiple Systems

Neglected List I

Neglected List II

Herschel, J.F.W.

20113+3550 HJ 1489AD

20^h 11^m 19.16^s +35° 49' 49.0" P.A. 52.00 sep 17.1 mag 9.69,9.88 Sp B2III-IV

Coord 2000	20113+3550		Discov num	HJ 1489		Comp	AD		Coord arcsec 2000	20 11 19.16 +35 49 49.0
Date first	1828		Date last	2018		Obs	21
Pa first	56		Pa last	52		P.A. Now (θ)	52°
Sep first	13.0		Sep last	17.1		Sep. Now (ρ)	17.1"
Mag pri	9.69		Mag sec	9.88		delta mag (ΔM)	0.19		Spectral class	B2III-IV (blue-white)
Pri motion ra	-005		Sec motion ra	-003
Pri motion dec	-008		Sec motion dec	-007
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.237 (< 0.3, Physical double)

This double is physical.

20113+3550 SYSTEM COMPONENTS

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20113+3550	BU 430	AB	1877	2016	19	23	1.2	9.69	10.37	0.68
Show			20113+3550	BU 430	AC	1926	2015	5	173	7.2	9.69	14.20	4.51
Show			20113+3550	HJ 1489	AD	1828	2018	21	52	17.1	9.69	9.88	0.19		<===

Quadruple system
4 visible stars in this system

OTHER CATALOGS AND DESIGNATIONS

Precise pa	51.6		Precise sep	17.128		Constellation	Cygnus		Tycho2	2683-03018-1
Gaia DR2	27281717888

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20113+3550	HJ 1489	AD	2005	17	51	17.3	9.69	9.88	B2III-IV	D	201119.16+354949.0
20113+3550	HJ 1489	AD	2015	20	51	17.4	9.69	9.88	B2III-IV	N	201119.16+354949.0
20113+3550	HJ 1489	AD	2018	21	52	17.1	9.69	9.88	B2III-IV	N	201119.16+354949.0

If you need more information about this double, apply for a data request form to the WDS.